/*
 * Copyright (c) 2004-2022, University of Oslo
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors 
 * may be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.hisp.dhis.organisationunit;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import lombok.RequiredArgsConstructor;
import org.hisp.dhis.commons.filter.FilterUtils;
import org.hisp.dhis.user.CurrentUserUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

/**
 * @author Torgeir Lorange Ostby
 */
@RequiredArgsConstructor
@Service("org.hisp.dhis.organisationunit.OrganisationUnitGroupService")
public class DefaultOrganisationUnitGroupService implements OrganisationUnitGroupService {
  // -------------------------------------------------------------------------
  // Dependencies
  // -------------------------------------------------------------------------

  private final OrganisationUnitGroupStore organisationUnitGroupStore;

  private final OrganisationUnitGroupSetStore organisationUnitGroupSetStore;

  @Autowired private OrganisationUnitService organisationUnitService;

  // -------------------------------------------------------------------------
  // OrganisationUnitGroup
  // -------------------------------------------------------------------------

  @Override
  @Transactional
  public long addOrganisationUnitGroup(OrganisationUnitGroup organisationUnitGroup) {
    organisationUnitGroupStore.save(organisationUnitGroup);

    return organisationUnitGroup.getId();
  }

  @Override
  @Transactional
  public void updateOrganisationUnitGroup(OrganisationUnitGroup organisationUnitGroup) {
    organisationUnitGroupStore.update(organisationUnitGroup);
  }

  @Override
  @Transactional
  public void deleteOrganisationUnitGroup(OrganisationUnitGroup organisationUnitGroup) {
    organisationUnitGroupStore.delete(organisationUnitGroup);
  }

  @Override
  @Transactional(readOnly = true)
  public OrganisationUnitGroup getOrganisationUnitGroup(long id) {
    return organisationUnitGroupStore.get(id);
  }

  @Override
  @Transactional(readOnly = true)
  public OrganisationUnitGroup getOrganisationUnitGroup(String uid) {
    return organisationUnitGroupStore.getByUid(uid);
  }

  @Override
  @Transactional(readOnly = true)
  public List<OrganisationUnitGroup> getAllOrganisationUnitGroups() {
    return organisationUnitGroupStore.getAll();
  }

  @Override
  @Transactional(readOnly = true)
  public List<OrganisationUnitGroup> getOrganisationUnitGroupsWithGroupSets() {
    return organisationUnitGroupStore.getOrganisationUnitGroupsWithGroupSets();
  }

  @Override
  @Transactional(readOnly = true)
  public List<OrganisationUnitGroup> getOrganisationUnitGroupsWithoutGroupSets() {
    return organisationUnitGroupStore.getOrganisationUnitGroupsWithoutGroupSets();
  }

  // -------------------------------------------------------------------------
  // OrganisationUnitGroupSet
  // -------------------------------------------------------------------------

  @Override
  @Transactional
  public long addOrganisationUnitGroupSet(OrganisationUnitGroupSet organisationUnitGroupSet) {
    organisationUnitGroupSetStore.save(organisationUnitGroupSet);

    return organisationUnitGroupSet.getId();
  }

  @Override
  @Transactional
  public void updateOrganisationUnitGroupSet(OrganisationUnitGroupSet organisationUnitGroupSet) {
    organisationUnitGroupSetStore.update(organisationUnitGroupSet);
  }

  @Override
  @Transactional
  public void deleteOrganisationUnitGroupSet(OrganisationUnitGroupSet organisationUnitGroupSet) {
    organisationUnitGroupSetStore.delete(organisationUnitGroupSet);
  }

  @Override
  @Transactional(readOnly = true)
  public OrganisationUnitGroupSet getOrganisationUnitGroupSet(long id) {
    return organisationUnitGroupSetStore.get(id);
  }

  @Override
  @Transactional(readOnly = true)
  public OrganisationUnitGroupSet getOrganisationUnitGroupSet(String uid) {
    return organisationUnitGroupSetStore.getByUid(uid);
  }

  @Override
  @Transactional(readOnly = true)
  public List<OrganisationUnitGroupSet> getAllOrganisationUnitGroupSets() {
    return organisationUnitGroupSetStore.getAll();
  }

  @Override
  @Transactional(readOnly = true)
  public List<OrganisationUnitGroupSet> getCompulsoryOrganisationUnitGroupSets() {
    List<OrganisationUnitGroupSet> groupSets = new ArrayList<>();

    for (OrganisationUnitGroupSet groupSet : getAllOrganisationUnitGroupSets()) {
      if (groupSet.isCompulsory()) {
        groupSets.add(groupSet);
      }
    }

    return groupSets;
  }

  @Override
  @Transactional(readOnly = true)
  public List<OrganisationUnitGroupSet> getCompulsoryOrganisationUnitGroupSetsWithMembers() {
    return FilterUtils.filter(
        getAllOrganisationUnitGroupSets(),
        object -> object.isCompulsory() && object.hasOrganisationUnitGroups());
  }

  @Override
  @Transactional(readOnly = true)
  public List<OrganisationUnitGroupSet> getCompulsoryOrganisationUnitGroupSetsNotAssignedTo(
      OrganisationUnit organisationUnit) {
    List<OrganisationUnitGroupSet> groupSets = new ArrayList<>();

    for (OrganisationUnitGroupSet groupSet : getCompulsoryOrganisationUnitGroupSets()) {
      if (!groupSet.isMemberOfOrganisationUnitGroups(organisationUnit)
          && groupSet.hasOrganisationUnitGroups()) {
        groupSets.add(groupSet);
      }
    }

    return groupSets;
  }

  @Override
  @Transactional
  public void mergeWithCurrentUserOrganisationUnits(
      OrganisationUnitGroup organisationUnitGroup,
      Collection<OrganisationUnit> mergeOrganisationUnits) {
    Set<OrganisationUnit> organisationUnits = new HashSet<>(organisationUnitGroup.getMembers());

    Set<OrganisationUnit> userOrganisationUnits = new HashSet<>();

    Set<String> userGroupIds = CurrentUserUtil.getCurrentUserDetails().getUserGroupIds();
    for (String orgUnitId : userGroupIds) {
      userOrganisationUnits.addAll(
          organisationUnitService.getOrganisationUnitWithChildren(orgUnitId));
    }

    organisationUnits.removeAll(userOrganisationUnits);
    organisationUnits.addAll(mergeOrganisationUnits);

    organisationUnitGroup.updateOrganisationUnits(organisationUnits);

    updateOrganisationUnitGroup(organisationUnitGroup);
  }

  @Override
  @Transactional(readOnly = true)
  public OrganisationUnitGroup getOrgUnitGroupInGroupSet(
      Set<OrganisationUnitGroup> groups, OrganisationUnitGroupSet groupSet) {
    return organisationUnitGroupStore.getOrgUnitGroupInGroupSet(groups, groupSet);
  }
}
